Materials Stress Strain Analysis

{
  "data": {
    "chargedAmount": "100019",
    "inputHash": "sha256:eefd89b7e92c7d8615516e3ff4b146f97c1a59ed0d48dbcb52d40d82c…",
    "limitations": [
      "Public or synthetic inputs only. Caller labels are declarations,…"
    ],
    "productId": "materials-stress-strain-analysis",
    "result": {
      "findings": {
        "elasticFit": {
          "degreesOfFreedom": 1,
          "intercept": -1.42108547152e-14,
          "rSquared": 1,
          "residualStandardError": 1.42108547152e-14,
          "residuals": [
            1.42108547152e-14
          ],
          "slope": 100000,
          "slopeStandardError": 1.00485917356e-11
        },
        "elasticModulusMPa": 100000,
        "energyDensityMJPerM3": 2.35,
        "method": "engineering input; declared inclusive elastic window OLS; first …",
        "offsetYieldMPa": 261.538461538,
        "ultimateStressMPa": 300
      },
      "limitations": [
        "Public or synthetic research inputs only; no patient, personal g…"
      ],
      "methodVersion": "maha-science50/1.0.0",
      "numericPrecision": "IEEE754-double; finite outputs rounded to 12 significant digits"
    },
    "resultHash": "sha256:83f46d4829527b52fe67fb475994b516b2ecc5a3f2afc5b48d685c821…",
    "sourceContractAmount": "61001",
    "version": "maha-legacy-adapter/1"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/compute/materials/stress-strain-analysis' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","elasticFitEndIndex":2,"strain":[0,0.001,0.002,0.003,0.01],"stressMPa":[0,100,200,250,300]}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://www.mahastrategies.com/api/v1/compute/materials/stress-strain-analysis' \
  -H 'content-type: application/json' \
  --data-raw '{"dataClass":"synthetic","elasticFitEndIndex":2,"strain":[0,0.001,0.002,0.003,0.01],"stressMPa":[0,100,200,250,300]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.100019 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.100019" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.100019 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fcompute%2Fmaterials%2Fstress-strain-analysis&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/compute/materials/stress-strain-analysis", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "dataClass": "synthetic",
    "elasticFitEndIndex": 2,
    "strain": [
      0,
      0.001,
      0.002,
      0.003,
      0.01
    ],
    "stressMPa": [
      0,
      100,
      200,
      250,
      300
    ]
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.100019 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.100019"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/compute/materials/stress-strain-analysis",
        json={
            "dataClass": "synthetic",
            "elasticFitEndIndex": 2,
            "strain": [
                0,
                0.001,
                0.002,
                0.003,
                0.01,
            ],
            "stressMPa": [
                0,
                100,
                200,
                250,
                300,
            ],
        },
    )
    print(res.status_code, res.text)